A Font specifically licensed and formatted for delivery over the web via CSS @font-face rules, enabling browsers to download and render Typeface that are not installed on the user's device. The dominant web font format today is WOFF2 (Web Open Font Format 2.0), which applies Brotli compression to OpenType or TrueType data for efficient transfer. Web fonts transformed digital typography by freeing designers from the handful of 'web-safe' system fonts, but introduce performance considerations — file size, loading strategy (swap, block, fallback), layout shift — that must be managed for optimal user experience.